102536521 has 4 divisors (see below), whose sum is σ = 107933200. Its totient is φ = 97139844.

The previous prime is 102536519. The next prime is 102536527. The reversal of 102536521 is 125635201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102536521 - 2¹ = 102536519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102536527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2698311 + ... + 2698348.

It is an arithmetic number, because the mean of its divisors is an integer number (26983300).

Almost surely, 2^102536521 is an apocalyptic number.

It is an amenable number.

102536521 is a deficient number, since it is larger than the sum of its proper divisors (5396679).

102536521 is an equidigital number, since it uses as much as digits as its factorization.

102536521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5396678.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 102536521 is about 10126.0318486562. The cubic root of 102536521 is about 468.0506571532.

The spelling of 102536521 in words is "one hundred two million, five hundred thirty-six thousand, five hundred twenty-one".